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Planning of HVDC System Applied to Korea Electric Power Grid
DongHee Choi*, Soo Hyoung Lee**, Gum Tae Son***, Jung-Wook Park* and Seung-Mook Baek
Abstract This paper proposes pre-analysis on planning of high-voltage direct current (HVDC) transmission system applied to Korea electric power grid. HVDC transmission system for interface lines has been considered as alternative solution for high-voltage AC transmission line in South Korea since constructing new high-voltage AC transmission lines is challenging due to political, environmental and social acceptance problems. However, the installation of HVDC transmission system as interface line in AC grid must be examined carefully. Thus, this paper suggests three scenarios to examine the influences of the installation of HVDC transmission system in AC grid. The power flow and contingency analyses are carried out for the proposed scenarios. Power reserves in metro area are also evaluated. And then the transient stability analysis focusing on special protection scheme (SPS) operations is analyzed when critical lines, which are HVDC lines or high voltage AC lines, are tripped. The latest generic model of HVDC system is considered for evaluating the impacts of the SPS operations for introducing HVDC system in the AC grid. The analyses of proposed scenarios are evaluated by electromechanical simulation.
Keyword Contingency analysis, Electromechanical simulation, Generic model, Generation rejection scheme, High-voltage AC transmission line, High voltage direct current, Overload capability, Power flow analysis, Power reserve, Special protection scheme, Transient stability
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